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Clavien-Dindo vs. Comprehensive Complication Index in the evaluation of postoperative complications in elderly people undergoing percutaneous nephrolithotripsy: a retrospective study

Grant number: 23/13960-4
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2023
Effective date (End): November 30, 2024
Field of knowledge:Health Sciences - Medicine - Surgery
Principal Investigator:Alexandre Danilovic
Grantee:Gustavo Monteiro Perrone de Oliveira
Host Institution: Faculdade de Medicina (FM). Universidade de São Paulo (USP). São Paulo , SP, Brazil


Percutaneous nephrolithotripsy (PCNL) is the standard treatment for complex kidney stones, but it can have serious complications. The Clavien-Dindo Classification helps to evaluate those. However, it simplifies by considering only the most serious. The Comprehensive Complication Index (CCI) was developed to address this limitation by providing an index that assesses multiple complications. Nevertheless, before we adopt it as a substitute, it is important to determine whether CCI has a greater impact on postoperative prediction. Elderly patients are more prone to develop serious postoperative complications, therefore this population is ideal to compare these two classifications. To this end, we will carry out a retrospective study with patients over 60 years of age who underwent PCNL between 2009 and 2020 at the Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo. We will collect demographic information, medical history, surgical time, and complications from these patients based on medical records. We will apply the Clavien-Dindo Classification and the CCI to these complications, with the aim of evaluating whether there is a difference in correlation between them in relation to length of stay and visits to the emergency room. Additionally, we will evaluate which variables may be associated with the severity and multiplicity of complications.

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